Hi, I had this problem too after I got my new Samsung Galaxy s5. The emojis are just awful - you can't tell what most of them are and they don't look anything like the FB, Twitter, iOS or Android ones.... I am sure someone thought it was a good idea to change them, but if it isn't broken don't fix it! I have tried rooting my phone with just about every method I could find on-line, just to change the colour scheme and the emojis - crazy! But I have not been able to root it using any method. I finally managed to fix the colour scheme issue, and then I found a way to fix the emoji issue, without rooting it, by installing custom fonts and changing them in Display>Font>Change Font. You can download the fonts from Google Play - they seem to have done quite a few packs. I installed the standard iOS and Android ones... Your emojis then change in every app, apart from WhatsApp for some reason. Each of the packs is just called Emoji Font 1 or Emoji Font 2 etc. (2 is the standard Android emojis). There is a You Tube video entitled Change Android Emoji Characters without Root (it won't let me post the link). Hope that helps.